Weaving with multicylinder shedforming machines



H. STAUBLI Aug. 6, 1940.

WEAVING WITH MULTICYLINDER SHED FORMING MACHINES Filed May 2, 1938 2 Sheets-Sheet l Mai Aug. 6, :1940.

WEAVING WITH MULTICYLINDER SHED FORMING MACHINES Filed May 2, 1938 2 Sheets-Sheet 2 1 InvcnZor;

H. sTAuB u v 2 ?10.468

Patented Aug. 6, 1940 WEAVING WITH MULTICYLINDER SHED- FORIWING MACHINE S Hugo Staubli, Zurich, Switzerland, assignor to Gebr. Staubli & 00., Horgen, Zurich, Switzerland Application May 2, 1938, Serial No. 205,581

In Switzerland May 11, 1937 6 Claims.

This invention relates to the positive forward and backward weaving in multicylinder shedfor-ming machines with pattern-cards of pasteboard, Verdols paper or similar thin material.

'5 In the shed-forming machines hitherto known with more than one pattern-card cylinder for pattern cards ofthisnature it has not been possible to re-open in the correct'sequence the wefts woven in When rotating backwards during the 10 reversal from one cylinder to the other. The present invention relates to a machine ensuring the re-opening of the wefts that are woven in, even during the transition from one cylinder to the other, when rotating the machine backwards.

I 15 For this purpose the pattern card of each 'cylinder receives, both for the last andfor the first movement from the end and from the beginning respectively of the repeat of the pattern, a projection or a perforation (change hole), whereby 20 a feeler (needle or other suitable implement) is influenced, and in its turn releases the feeding movement of a counting cylinder by known mechanical means.

The machine constructed acording to the in- 25 Vention is hereinafter described by way of example with reference to the accompanying drawings, illustrating a two-cylinder machine, which works in double lift, and in which two picks are read at the same time. The meansfor changing 30 the pick-reading device from one pattern card to another are similar to that shown in the copending application No. 205,580 which refers to a machine of the same general. type to which the present machine relates. In these drawings: Figure 1 shows one side of a dobby'in sid elevation;

Figure 2 shows the same side in end elevation; Figure 3 shows the other sideof the machine in side elevation; Figure 4 shows this other side in end elevation;

Figure 4a. shows a part of Fig. 4' with further details; and p Figure 5,shows the beginning and the end of the repeat of the pattern cards. The arrow I '4 indicates the forward-movement, the arrow II the backward-movement of the pattern-card In the first place it will be assumed that the machine is working forwards. denoted by A, and the other by B. Each cylinder 50 carries a pattern card, I and 2 respectively, with series of pickholes s of usual kind, the pattern repeat of the cylinder A containing for example twenty picks, and that of the cylinder B thirty picks. In order to weave the pattern of the .55. abric, the number of picks to the repeat of the One cylinder is of the cylinder A has been read as times; and the changing of the reading from the cylinder B to the cylinder A is efiected a-fterthe number of picks to the repeat of the cylinder B has been read 1 times, and so on. Since two picks are al ways read at the same time, in a double-lift machine, each cylinder movement brings the two following picks to be read; the last movement of the cylinder A having regard to its number of picks per repeat therefore brings the picks A-l;9 and A (Fig. 5) to be read, and the first movement of the cylinder A, having regard to its number of picks to the repeat, causes the picks AI and Alto be read. Thesame remark applies to the cylinder B, where B B are the first, B 20 and 3 the last picks of the repeat (Fig. 5). In

the pattern of the fabric this has the result that after the a: times twentieth pick of the-cylinder A the first pick of the cylinder Bis woven in, and after the y-times thirtiethpickof the-cylinder B the first pick of the cylinder A is woven in again.

' The transition from one cylinder to the other is accomplished by known means with the cooperation of a counter cylinder 20, shown in 30 Figures 3 and 4, which contain's'a counting card 40, upon which i-ron rollers or wooden pegs 46 are mounted on such places, where the transition from one cylinder tothe other shall be accomplished, that is in the case assumed for the m times twentieth pick of the cylinder A and then againfor the y times thirtieth pick of the cylinder' B. Between these points of time no iron rollers or wooden pegs are mounted. In order to'actuate the counting cylinder 20, or in other 40 words to release its feeding movement, each pattern-cardcontains onthe same level as the last two series of pick holes, that is at the last pick reading of the repeat a projectionor a hole a or 12 respectively. This projection or hole is read by a suitable member, such as a feeler needle 3 or the like, as shown in Figure 4, and this needle is connectedwi-th the feeding means of the counting cylinder as follows: The feeler needle 3 depends from an arm 60 loosely mounted on ashaft GI on which arexmounted also the arms supporting the ordinary pick-:reading needle (not shown) actuated and operating in the" manner shown and described for instance in'appIican'ts ,PatentNo. 1,892,323. On said arm 55,

(ill hangs also a wire 58 the lower end of which is guided on an arm 62 fixed on a shaft 63. A shaft 64 receives reciprocating partial rotary movements from a shaft 65by means of a cam disc 66 and a roller 6'! which latter is mounted on an arm 68 fixed on the shaft 64. On this shaft 64 is further fixed an arm 69 to which is linked a pawl ill extending beneath the lower end of the wire 53 so that by lowering said wire 58 the arm 62 is coupled with the pawl 10 so as to receive a partial rotation in clockwise direction (Fig. 4 and 4 fixed an arm 1| which, by means of a link 12 is connected with a lever 4| loosely mounted on the shaft 65 and extending over the counting cylinder 23 so as to become engaged by the pegs 45 or iron rollers mounted thereon.

A lever 73 fixed on the shaft 63 reaches beneath one arm of a bell crank lever 14 loosely mounted on a shaft 15 (Fig. 3'). The upstandingarm of this lever 14 extends behind a roller 23 continuously rotating with a shaft 24 upon which it can be displaced in axial direction. Said roller 23 carries two pins 25 and 26 which, when the roller 23 is displaced by the lever 14, come within reach respectively of the ratchet pinion 33 of the reversing eccentric 33 (Fig. 2) and of the ratchet pinion 3| of the counting cylinder 23.

It will be seen that every time the pawl 10 is coupled with the lever 62 the shaft 63 receives a rotary movement by which, over the lever II and the link 12, the lever 4| is lifted and over the lever 73 the bell crank lever 14 displaces the roller 23 so as to bring its pins 25 and 26 in reach of the ratchet pinions 3i] and 3| respectively. Thus the transitionfrom one pattern card cylinder to another is effected if a wooden peg or iron roller has been brought underneath the lever 4|.

In order to obtain this transposition from one cylinder to the other even for the backward running of the machine it is necessary, after the last movement of the cylinder before the change to the other cylinder, likewise to have a projection or perforation a (D (change hole) in the pattern-card. This last movement in the backward working of the machine, however, causes the reading of the first and second pick of the repeat. In order therefore to obtain the correct opening of the interlaced wefts,projections or perforations in the pattern card must be brought to influence the feeler needle at the reading of the two first as well as of the two last picks.

The dropping of the feeler needle 3 into the change hole, or the running of the change lever up on to a change eye (projection), displaces, as already explained, the continuously rotating roller 23 in an axial direction and thereby brings the pins 25 and 26 within reach of the ratchet pinions 38 and 3| respectively. In point of time the pins 25 and 26 are so adjusted in relation to the mechanism as a whole, that after the feeler needle 3 has dropped in, or a lever has run up on to the projections provided in the paper, first a feeding movement of the counting cylinder is elfected by the engagement of the pin 26 with the ratchet pinion 3|. If after a movement of the counting cylinder a peg 46 or an iron roller is provided in the change card 40, the roller 23 is further held by the lever system described above with reference to Fig. 4 in its axially displaced position, so that its shift pin also effects a feeding movement of the reversing eccentric 33. The reading is now eifectedtherefore by the On the shaft 63 there is also.

other cylinder, and the feeler needle 3 or the lever upon which the projection in the paper acts again finds on the fresh card that comes to be read a perforation or a projection 0 13 which effects a fresh feeding movement of the change cylinder 20. If after this movement of the change cylinder there is no longer a peg 46 or an iron'roller upon the change card, the roller 23 can go back again into its basic position so that a feeding movement of the reversing eccentric 33 no longer takes place. Upon backward rotation of the machine, by the reading of the change hole or of the corresponding projection in the pattern-card, the axial displacement of the shift roller 23 is again effected, which occasions the backward feeding of the change cylinder 20.

If after this backward feeding movement there is a peg 43 or an iron roller upon the change cylinder 23, the feed roller 23 is held in its axiallydisplaced position, so that the backward feeding of the reversing eccentric 33 is effected. The reading is then effected again by the first cylinder, and since the pattern card at this position again carries a perforation or a projection 1 (13 a further feeding movement of the change cylinder rearwards takes place. If after this second movement the pattern-card no longer carriesa peg oran iron roller, the roller 23 can go back again ,into its basic position before the pin, 25 could effect a further feeding movement of the reversing eccentric 33.

Generally speaking the reading needle 3 of the change hole, or the lever running over a projection, releases the feeding movement of the counting cylinder 20 if there is a change hole or a projection; in the pattern-card, while a peg or an iron roller in the change card actuates the. reversing mechanism. Under these circums'tancesit is immaterial whether the roller 23 carries both the feeding pins 25 and 26, or Whether these pins are carried by two separate ratchet discs. In the transition from one cylinder to the other the cylinder coming afresh to be read must of course also be fed forward, while the cylinder that was previously being read remains stationary. This occurs for instance owing tothe axial displacement of a shifting cam 49, shown in Figure ,1, by means of a cam disc 53, which swings a lever 54, and which is mounted fast upon; the same shaft 32 as the reversing eccentric 3 3. The feeding of the cylinder coming toberead and the stoppage of the cylinder that has just been read, are thereby ensured. This t ansposition may be effected by any other convenient known means, the material point being merely the co-operation in respect of time with the reversing eccentric.

What I claim is:

I. 1. A shed-forming machine comprising more than one pattern card of pasteboard, Verdols aper or other thin material, and a cylinder for each of these pattern cards, two special controlling'elements on each of said pattern cards, for each repeat thereof and following one another in' the direction of movingrthe pattern cards, a feeler member adopted to be influenced by two of said special controlling elements either on the same pattern card or on different pattern cards within'the time of two subsequent pick-reading actions and means for effecting the reading of said special controlling elements by a feeler member ,either from the same pattern card or fromLtwo-adifierent pattern cards under predeterminedconditions after the first one of said two subsequent reading actions.

2. A shed-forming machine comprising more 'than one pattern card of pasteboard, Verdols paper or other-thin material, a cylinder for each of these pattern cards, two special controlling elements on each of said pattern cards for each repeat of the pattern card, said two special controlling elements following one another in the direction of moving these cards at a distance corresponding most conveniently to the amount for whichthe pattern card is moved between the succeeding pick reading actions, a feeler member adapted to be brought under the influence of two of said controlling elements within the two subsequent pick reading actions, means for causing said feeler member to be changed over at predetermined conditions from one pattern card cylinder to another after the reading of the first of said two controlling elements so as to read on the other cylinder during the next pickreading action.

3. A shed-forming machine comprising more than one pattern card of pasteboard, Verdols paper or other thin material, a cylinder for each of these pattern cards, two special controlling elements for each repeat on each or said pattern cards, a feeler member adapted to be influenced by said controlling elements, a counting cylinder, members on this cylinder for controlling the number of repeats to be read from each of the pattern cards during a working period thereof, a changing over mechanism for changing from one pattern card cylinder to another, continuously rotating coupling means adapted to be brought successively to act one upon said counting cylinder and the other upon said mechanism.

4. A shed-forming machine comprising more than one pattern card of pasteboard, Verdols.

paper or other thin material, two special controlling elements for each repeat on each of said pattern cards, a feeler member adapted to be successively influenced by said controlling elements either on the same pattern card or on different pattern cards, a counting cylinder, a changing over mechanism for changing from one pattern card to another, ratchet pinions on said counting cylinder and the changing over mechanism, two coupling pins adapted to rotate continuously and to be displaced along their axis of rotation, a lever system inserted between said feeler member and said coupling pins and adapted to become operative by the reading action of said feeler member on one or the otherpattern card so as to bring said coupling pinsin engagement changing over one with the ratchet pinion on the counting cylinder and the other with that of the changing over mechanism. 7

5. A shed-forming machine comprising more than one pattern card of pasteboard, Verdols paper or other thin material, two controlling elements for each repeat on each of these pattern cards, said controlling elements being disposed one behind another most conveniently at a distance equal to the amount of movement of the pattern cards between two subsequent pick readings, a feeler member adapted to be influenced by said controlling elements, a counting cylinder, a changing Over mechanism for changing the drive of the pattern cards and the reading of picks from one pattern card to another, acontinuously rotating roller adapted to be displaced along its axis,coupling pins on-this roller, a lever system influenced by said feeler member so as to cause one of said coupling pins to actuate the counting cylinder, an adjustable controlling member for each pattern card on the counting cylinder adapted to retain said lever system in its operative position and to allow thus the second of said coupling pins to actuate the changing over mechanism.

6. A shed-forming machine comprising more than one pattern card of pasteboard, Verdols paper or other thin material and more than one pattern card cylinder, two controlling elements for each repeat on each of these pattern cards, a feeler member adapted to be influenced by said controlling elements within the time of two succeeding pick readings, a counting cylinder, a changing over mechanism for changing the drive of the pattern cards and the usual pick reading from one pattern card to another, a continuously rotating member adapted to be displaced along its axis, two coupling pins on thismember at different angular positions, a lever system influenced by said feeler member so as to cause one of said coupling pins to actuate said counting cylinder, acontrolling member on this counting cylinder adjustable in circumferential direction of the cylinder and adapted to retain said lever system in its operative position, a ratchet pinion in reach of which the second of said coupling pins is held in said operative position of the lever system, a changing over eccentric and a cam disc fixed on the same shaft as said ratchet pinion, a lever adapted to be operated by said cam disc, and a shifting cam adapted to be brought in driving engagement with one or the other of the pattern card cylinders alternately. 

